Schumann Sine Wave Resonance Generator Ultra Low Frequency Generator FG-300 0.1Hz-200000Hz Adjustable for Healing Sound Frequency

this unit has features that I've not been able to find on other units like brightness it control, timed duration control and more

The box didn't come with instructions other than how to input the Hz. So there are wires I don't know what to do with. And I don't know how to get it to work when it's not plugged in. The battery says 100%, but when I unplug it, it turns off. I bought this because it's cheaper than other ones I've seen. But I will be returning it and spending more money for one that has proper instructions and is portable. As for the review about not knowing how to plug it in without requiring it - it's just a USB. So it was pretty easy to plug it into a USB port.

If you think it works, it works, thats all i can say about this item

It looks like a good idea the charger they sent me does not fit the box they gave me the plug that fits the box but they want me to wire it up myself. I'm not an electrician so how do I charge it? I'm sending it back.

it lights up but will only turn on while it is plugged into the USB charger (even when it is fully charged). it has no instructions and comes with extra pieces with no mention of their purpose. dont waste your money. this product is a scam.

Didn't operate, not one sound. Instruction had to found on line. Cheap. Don't waste your money and Walmart should pull this unit off their site.

DOA . No sound coming from device. Powers up only when plugged into a USB charger. Even though the battery says 100% as soon as you unplug it it goes dead. Absolutely worthless! I wish they would have sent a model that worked. Also there are really no instructions that come with I had to look them up on the internet and then they were very poor.

It doesn't work unless plugged in even though the battery says 100%

Did not work and came without instructions